Roller weir with extension gate



Nov. 26, 1929. F. DUWE ROLLER WEIR WITH EXTENSION GATE Filed Jan. 25', 1928 Patented Nov. 26, 1929 UNITED STATES PATENT OFFICIE FRIEDRICH DUWE, OF MAINZ, GERMANY, ASSIGNOR- TO MASCHINENFABRIK AUGS- IBURG-NURNBERG A. G., F NUREMBERG, GERMANY, A CORPORATION OF GER- MANY ROLLER WEIR WITH EXTENSION GATE Application filed January 25, 1928, Serial No. 249,322, and in Germany August 18, 1927.

within the drum body which 'forms the gate. of the weir there is provided a lever mecha nism or similar contrivance, co-axial with said drum-body and the parts of the chain passing around said drum body, the arms of said lever mechanism projecting through the wall of the drum-body in such a manner that at least one of said arms will be in engagement with the slidingly arranged chain in every position of said drum-body, while the motion of said chain during condition of no-load is transmitted by means of a system of levers to said device.

In the accompanying drawing showing an 5 embodiment of the present invention in connection with a drum-weir;

Fig. 1 is a side elevation of a drum-weir and gate, Fig. 2 a section through one end of the weir-drum, andFig. 3 a top plan view of As shown in the drawing, the endless chain 6 is operated by means of the pinion a of a winch and carried around the drum-body d by means of guiding members 0, Fig. 2. In

.the lowered position of the drum d the chain 6 is released from the load of the weir and may slide around the drum-body between the guiding members 0.

Co-axially to the drum d and the parts of the chain passing around the latter, there is provided a two-arm lever or similar body, having arms 1 and 1 projecting through slots provided in the wall of the drum (1. The arm 1 of this lever, being downwardly directed in the closing position of the drum (1,

is in engagement with the chain 6 while the arm 1 is out of engagement and arranged in such a manner that it comes into engagement with the chain 6 after the extension gate is has been laid down or after the drum-body d has been turned to a certain angle, before the arm 1 is withdrawn from engagement with said chain 6. A further lever 4 is mounted upon the hub of the two-arm lever, said lever 4 being'connected with the movable extension gate is, provided on' the drum'd, by means of the link 5. v

The chain 6 is further provided with a stop we at a point between the pinion a of the winch and a guiding roller- 1" which is provided in the rear of said winch, said stop co-operating with fixed abutments 0 and p. A suspension device 9 of well known kind is provided for suspending said ehain b in a plurality of parts, as indicated iii'Fig. 1, said parts being wound up during the lifting of the drum d. However, the parts thus far described do. not constitute the subject matter of the present invention.

The mode of operation of the weir and the device. for erecting and laying down the movable extension gate is is as follows: In order to lay down the movable extension gate is, the winch is caused to rotate as indicated by the arrow at the upper part of the drawing. By means of the chain I) which passes around the drum d at the ends thereof in sliding engagement therewith the lever mechanism 11 is caused to rotate in the direction as indicatedby the arrow, so that the movable extension gate k will be laid down by the said lever-and-rod-system 4:, 5. If it is desired to raise the drum d, the operation of the winch is continued, so that the drum body at will be lifted, the locking member m provided on the chain having come in the meanwhile into engagement with the stop 10. The arm l has now been withdrawn from engagement with the chain 6, the arm l having previously come into engagement with the chain 6. In the raised position of the drum 0?, the several parts will be in a position as indicated in dotted lines in the drawing. During the lowering of the drum d and during the erection of the extension gate is the motions of the several parts will be reversed. v

The shape of the two-arm lever 1-1 may of course also be difierent from that shown in. the drawing, and the two arms 1 and 2 -1,7se;su1

1" of said lever may also be arranged to form a greater angle with each other than shown. It is only required that the arm 1 be not withdrawn from engagement with 5 the chain 6 before the arm 1 is in'engag ment with the chain and vice versa.

I claim: 7 I 1. In combination with a drum weir, a drum-body, an extension gate hinged there- 10 to, a chain adapted to pass around said drumbody in sliding engagement therewith, a twoarm lever plvotally mounted within said drum-body, at least one arm of said lever being in engagement with said chain, and a second lever adapted to transmit the mo-- 'tion of said chain when in condition of noload to said extension ate.

2. In combination with a drum weir, a drum-body, an extension gatehinged thereto, a winch, a chain passing around said drumbody in sliding engagement therewith and adapted to be operated by said winch, a two-arm lever pivoted within said drumbody coaxiall therewith, at least one arm of said lever sin in engagement with said chain, and a secon lever adapted to transmit the motion of said chain when in condition of no-load to said extension gate.

In testimony whereof I aflix m si ature. FRIEDRIC D 

